I currently run Mavic X517 Rims with Panaracer Pasella 1.15 slicks. I'm thinking of upgrading to Conti Grand Prix 1.0's. My 1.15's are easily wider than the rims.

For the ultimate street bike. As I also commute to work 11 miles each way. I'm looking at builing 700c wheels with XT disk hubs to run a "proper" set of road tyres. This gets away from the issue of different brake set-ups 650c Vs 700c. The wheels are likely to cost be around £120.

From running the Panaracer Passellas on my 650c wheels you really do lose out on wheel + tyre circumference. Losing top end speed on the flat or downhill. Depends how serious you tkae your "commute".

I run the cheaper Mavic x223 disk with Hutchinson Gold (26 x1.00) as my everyday wheelset. It is heavy but I train heavy and race light . I am planning to change this wheelset soon to a 700c with disc brakes, there is nothing wrong with too much wheelsets, right?

I would have thought that the reduction in weight would have been more important.

I use 26*1.5 IRC Metros and find they fly.

Brian

Ohh boy, this would be a long and difficult topic for everyone. I do believe in 650c wheelsets. I actually run them on my tri bike.
There has been a lot of debate about this wheel size including, weight, aerodynamics, rotational weight, etc.
If you look at the data of the participants of 2003 Ironman, only 1/3 of them were using 650c. It could be because of the reason that 650c's are for shorter riders and most participants are taller that uses >52 frames.
I use a 52 frame and I am actually considering on selling my 650 frame and wheelset to purchase a 700c frame.
I guess we need a new thread for this . . . .

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